Tramway truck



Oct. 15, 1929.

F/EJ.

J. A. WRIGHT TRAMWAY TRUCK Filed Dec. 7, 1927 5 Sheets-Sheet 1 @@Jmmmww CL 15, I1929-. J. A. WRIGHT 1,731,961

TRAMWAY TRUCK Filed Deo. 7, 1927 l 5 Sheets-Sheet 2 ,/irTa/iwEY.

Oct. l5, 1929: J. A. WRIGHT 1,731,961

' TRAMWAY TRUCK v Filed Dec- 7. 1927 s sheets-sheet 5 .ITTOR/VE Y Patented Oct. 15, 1929 hlhlllil PATE JAMES A. WRJGHT, OF VIGNTREAL, QUEBEC, C.l,` l\TADA TRA/IWAY TRUCK Application filed December' 7, 1927.

rlhis invention relates to motor driven `rail car trucks, and more particularly to the spring suspension and motor `mounting' oil trucks ot this class.

The principal object ot the invention is to provide a inotor driven rail car truck in which the unsprung weight is reduced to a niinirnuni, and in which the wheels are driven through iieiiible axles.

A further obj ect is to provide a truck trarne in which the electric motor is housed in a novel manner, and which by ineans oit its spring suspension results in a inarhed reduction of vibration and noise in operation, as well as in an increase in the durability and eiiiciency of the operating parts ot the assembly.

A further object isto provide a truck traine in which the motor and gear reduction housing forms the main traine.

rlhe invention consists in a traine, the central portion of which encasestheinotor, with vforward and rearward hollow extensions which encase the gear reduction mechanism and support the bearings oi' the ydrive shafts, and also on which the transverse springs ot the suspension are mounted, and side extensions on which the longitudinal springs are mounted.

The wheels, which arejournalled on independent wheel carriers coupled to the ends ot the springs, are driven from the driveshat'ts through flexible connections. y

The traine is preferably constructed with upper and lower sections lbolted together, whereby the assembly is readily connected up or taken down.

Reference is made to the accompanying drawings in which Fig. l a vertical section on the line l-l ol Fig. 3.

Fig. 2 is a vertical section on the line 2 2 of Fig. 3.

Fig. 3 is a plan view of the truck, partly in section.

Fig. l is a side View of the truck with one wheel removed.

Fig. 5 is a detail section of the wheel carrier on the line 5 5 of Fig. 3.

The trarne l comprises three sections, the

Serial No. 233,402.

central one being enlarged to 'forni a casing Yl2 1n which the in-otor 7 is housed, and having side extensions 10-l0, projecting outwardly on cach side ot the hing' pin ll and its socket 110. The end sections have transverse seats lli, above and below in which the transverse springs 2-2 are secured by anchor plates 15H15.

The traine l is preferably constructed in upper and lower portions which are bolted together through the edge lianges 121, which run around the end sections and the casing l2.

The side extensions lll-l0, as shown in Fig. 2, torni downwardly otfset arins extending frein the upper er cover portion ot the traine l. On the end ot these arins lO-l() are mounted longitudinal springs 3 3, secured thereto by anchor plates The upper anchor plates 30 are enlarged to torni. rest blocks 300 to support the car body and rerist side sway.

The end sections of the traine l also provide housings tor the reduction gears ille-76, and their side walls support bearings lil, 'l'or the drive shafts YB.

The inotor 'i' is journalled in bearings l?, sup ported on di aphragins 1G, between tl ie central and end sections et the traine, 'with bevelled pinions Tel, on the spindle et the Inotor 7, which mesh with bevelleil gears To,

keyed to the driving shafts T3,

rlhe traine l, including its three conipartments and eide extensions, and the motor drive mechanism, is thus entirely supgiorted on the series of springs 2 2 und Sal-3.

The wheels 5, with their etuh axles 50, are journalled `on bearings in sleeves 410, ot the wheel carriers ll.

rlhe stub arles 50 are coupled to the shutts 73 by flexible connections 6 including shaft sections, which may include dill'erential gears incertain `cases and thereby provide independent wheel drive.

The wheel carriers l have ribs Ll?) and upper and lower bearings l2 'for the pins 22, to which the transverse springs are coupled.

Plates 31 are riveted to the tace ot the wheel carriers l and extend towards the end of the truck, having slots 33, in which the brake beams slide.

At the innerside of the wheel carriers 4,

land throughthe plates 31, are pins 32, pro- Y jecting inwardly, to which the ends of the longitudinal springs 3 3 are coupled. 'p Withth'el construction as above described, a motor driven rail car truck is provided with Y a frame of rigid and robust design, in which the driving mechanism is completely housed,

Y and whichV can be readily opened up for repairs or replacements.

v The entire frame and the driving mecha- VVnism are spring suspended on a series of parallel Vpairs. of upper and lower springs,

Y whereby the weight of the car body is evenly distributed to the wheels, and smooth running kand absence of vibration are secured. The wheel carriers maintain the wheels in true vertical alinement with the frame and the car body thereon, while permitting free vertical movement. The brake beams sliding in the slotted extensions ofthe wheel carriers hold the vbrake shoes in proper position to the wheel on which each bears dur- Aing the vertical displacement of any wheel.

c, ro

f WhatY I claim is Y 1. In a'motor driven rail car truck, a frame comprising a central motor casing and for- -ward'and rearward gear reduction cas-ings,

having transverse seats aboveV and below in V'which the transverse springs of .the spring vwheel carriers coupled to the ends of both series of springs.

Y 3. In a motor driven rail car truck, the

1 lcombination of a frame comprising end gear reduction easings and a central enlargedinof tor Vcasing having loutwardly projecting side arms,y transverse springs seated in the end vcasings, and longitudinal springs mounted Von the sidearins, wheels having stub axles Ijournalled ony wheel carriers coupled to the ends of the springs, with a motor mounted in l. the motor casing, drive shafts journalled in the walls of the end casings, gear reduction mechanism coupling the motor to the V.drive shafts, and flexible couplings between 5 the drive shafts and the stub axles of the wheels.y Y

4. In VaY motor driven rail car truck, r'a frame comprising 'a central casing and two end casings, the central casing being enlarged to house amotor, formed of upper and lower sections with flanged edges, .adapted to be bolted together, the upper section having outwardly projecting downwardly offset arms, transverse springs seated in the end casings and longitudinal springs mounted on the ends of the arms, and wheels joui'- nalled in wheel carrieis coupled to the adj acent ends of the springs.

5. In a motor driven `ail car truck, a frame comprising a ceiitial cylindrical inotoi casing, a motor mounted therein, with rectangular boxed casings at each end, diaphragms between the casiiigs, bearings mounted in the diaphragms in which the inotor spindle is journalled, and bearings mounted in the walls of the end casings iii which drive shafts are journalled, and gear rednetion mechanism coupling the motor spindle to the drive shafts.

6. In a motor driven rail car truck, a main frame comprising a central motor casing, a inotoi' mounted therein with casings :it each end, diaphragins between the casings, bearings mounted in the diaphragins in which the motor spindle is joninalled, bearings mounted in the walls of the end casings in which the drive shafts are journalled, a bevel gear drive from the motor spindle to the drive shafts, wheels having stub axles, and shafts having universal joints connecting the drive shafts with the wheel stub axles.

7. In a motor driven rail car truck, a main frame comprising a central motor casing, a motor mounted therein, with casings at each end, diaphragms between the casings, bearings mounted in the diaphragins in which the motor spindle is `iournalled, bearings mounted in the walls of the end Casin in which the drive shafts are journalled, a bevel gear drive from the motor spindle to the drive shafts, wheels having stub axles, and shafts connecting the drive shafts with the wheel stub axles.

8. In a motor driven rail car truck, a main frame comprising a central motor casing, a motor mounted therein, with casings at each end, diaphiagins between the casings, bearings mounted in the diaphragins in which the motor spindle is journalled, bearings mounted in the walls of the end casiiigs in which the drive shafts are onrnalled, a. bevel gear drive from the motor spindle to the drive shafts, wheels having stub axles, and shafts having universal joints connecting the drive shafts with the wheel stub axles, and transverse springs above and below the end bearings connecting the main frame with the wheel carriers upon which the wheels are j ournalled.

JAMES A. IVRIGI-IT. 

